Systemimager is still progressing a lot!
New change since last announce:
- Support for CentOS-6 (finaly!)
- Support for Open SuSE-42.3
- Support For CentOS-7
- Support for Fedora-27
- Install script is not mandatory any-more (big change). You can still add one
though.
deployment process is the following:
pre-install / format disks / mount partitions / run main install script /
download/install image / install overrides / create config (mdadm, lvm, fstab,
initramfs, ...) / bootloader / post install
- many cmdline parameters to control systemimager imaging process (no more
option 140 DHCP parameters to configure (still supported)).
parameters can be set at multiple places (DHCP, local.cfg, PXE-cmdline,
/var/lib/systemimager/scripts/configs/<name>.conf)
- disk layout is set in xml format and stored in
/var/lib/systemimager/scripts/disks-layouts/<name>.xml this permits to have a
single image deployed to different nodes with different disks. No more one
image per disk layout.
- Now protocols are splitted in dracut sub modules (systemimager-xmit)
* For now, only rsync works. *
Planned:
systemimager-xmit-docker: build your image on a docker server (must be
complete), install it on deployed hardware!
systemimager-xmit-flamethrower
systemimager-xmit-nfs: mount your image tree thru NFS and rsync locally from
NFS mount point
systemimager-xmit-rsync: as usual
systemimager-xmit-ssh: using scp
systemimager-xmit-template: a template file for adding more protocols
systemimager-xmit-torrent: torrent deployment
- SSH tunnel is not considered any-more a protocol for systemimager image
deployment.
SSH tunnel is something running aside like a network layer. It was used for
rsync, but IMHO could also be used for other protocols like NFS, docker, ...
- systemimager parameters (set as shell variables in local.cfg or
/var/lib/systemimager/scripts/configs/<name>.conf or set as cmdline parameter
in PXE) are the following:
- si.debug / $DEBUG: values: y|n => Enable debug messages
- si.config / $SIS_CONFIG: name of file containing config (uses less
cmdline). File is stored in /var/lib/systemimager/scripts/configs/. Name is
given without its PATH
- si.image-name / $IMAGENAME: name of the image (looks for
imagename|imagename.master)
- si.script-name / $SCRIPTNAME: name of main script (looks for
scriptname|scriptname.sh|scriptname.master)
- si.disk-layout / $DISKS_LAYOUT: name of file containing disks layout in xml
format (see man autoinstallscript.conf for now) (looks for
filename|filename.xml)
- si.dl-protocol / $DL_PROTOCOL: protocolname as seen in dracut module
systemimager-xmit-<protocol name>.sh. defaults to rsync except if other
parameter let think otherwise.
- si.monitor-server / $MONITOR_SERVER: name or ip for monitor server
- si.monitor-port / $MONITOR_PORT: monitor server port (defaults to 8181.
min:100, max:32000)
- si.monitor-console / $MONITOR_CONSOLE: y|n|0|1|yes|no (enable/disable log
reported to monitor console)
- si.skip-local-cfg / SKIP_LOCAL_CFG: y|n|0|1|yes|no (default:n) if yes, try
to read local.cfg from old disks or floppy (USB planed of course but not yet
implemented)
- si.image-server / $IMAGESERVER: name or ip for the image server
- si.log-server-port / $LOG_SERVER_PORT: the log server port (default is 514,
min:100, max:32000)
- si.ssh-client / $SSH: y|n|0|1|yes|no (dfault "n").
- si.ssh-download-url / $SSH_DOWNLOAD_URL: ssh download URL => sets
DL_PROTOCOL to "ssh"
- si.ssh-server / $SSHD: y|n|0|1|yes|no (enable / disable sshd access while
imaging) (default "n")
- si.flamethrower-directory-portbase: $FLAMETHROWER_DIRECTORY_PORTBASE: path
- si.tmpfs-staging / $TMPFS_STAGING: path to staging dir.
- si.term / $TERM: terminal type to use. defaults to "linux"
- si.selinux-relabel / $SEL_RELABEL: y-n|0|1|yes|no: Request a SELinux files
relabel after imaging disks
- si.post-action / $SIS_POST_ACTION: what to do after imaging. defaults to
reboot. Possible values: kexec, shell, reboot, shutdown, poweroff (and soon
continue)
continue will boot the imaged system without reboot. This is possible as
initramfs is simply mounting OS filesystems in /sysroot and calls swaproot. We
are in the same situatiuon after imaging. We only need to check that imaging
kernel (uname -r) has modules available in /sysroot/lib/modules/$(uname -r)/,
then we exit the dracut hook initqueue and dracut finishes the boot for us.
- Parameters in DHCP are still possible and supported even in wickedd-dhcp4
dhcp client in SuSE distros.
- option-140: IMAGESERVER
- option-141: LOG_SERVER_PORT
- option-142: SSH_DOWNLOAD_URL
- option-143: FLAMETHROWER_DIRECTORY_PORTBASE
- option-144: TMPFS_STAGING
IMPORTANT:
- si_mkautoinstallscript is DEPRECATED and shouldn't be used (useless though)
- disk layout has changed. main scripts are now stored in
/var/lib/systemimager/scripts/main-install (not /var/lib/systemimager/scripts)
This looks like:
/var/lib/systemimager/scripts/cluster.txt # created by si_clusterconfig from
/etc/systemimager/cluster.xml
/var/lib/systemimager/scripts/configs/*.conf
/var/lib/systemimager/scripts/disks-layouts/*.xml
/var/lib/systemimager/scripts/hosts
/var/lib/systemimager/scripts/main-install/*.{,sh,master}
/var/lib/systemimager/scripts/post-install/*.sh
/var/lib/systemimager/scripts/pre-install/*.sh
Packages should be released soon for testing for the 4 distros annouced.
Next:
- support for continueboot after imaging
- *.deb packaging (hopefully if I don't hit dracut conflict with initramfs,
seems fixed by now)
(need a lot of work (major package rewrite and need to compute deps for all
perl (automatic for rpm))
All stuffs in initrd-from-imageserver-and-dont-package-initrd form systemimager
git
how to build yourself:
git clone -b initrd-from-imageserver-and-dont-package-initrd
https://github.com/finley/SystemImager.git
cd systemImager
make source_tarball
rpmbuild -tb tmp/systemimager-4.5.0.tar.gz
yum|dnf|zypper install <list of built package except flamethrower and
bittorrent one>
Happy testing.
PS: Please report any issues.
--
Olivier LAHAYE
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